Equalization

The process of adjusting the balance of frequency components in an audio signal by boosting or attenuating specific frequency bands. In accessibility contexts, adaptive equalization can be used to compensate for background noise by selectively boosting frequencies that are being masked by environmental sounds, improving the intelligibility of text-to-speech output, sonification cues, and other auditory feedback from assistive devices. This technique is particularly relevant for people with visual impairments who rely on audio output from mobile navigation aids in noisy urban environments.